Airbag control unit with part number 77960-SWA-F230-M4

What does the airbag control unit 77960-SWA-F230-M4 do?

The airbag control unit 77960-SWA-F230-M4 is the switching centre of the restraint system (SRS) in Honda vehicles. It processes the measurements from the crash sensors and determines, in a fraction of a second during an accident, which airbags and seatbelt pretensioners are triggered.

In parallel, the unit checks the entire system constantly for faults. If it detects a fault, it reports this via the airbag warning light in the instrument cluster.

After an accident, it stores crash data and locks itself. As a control unit, it thus forms the link between sensors and triggering.

Why does the control unit 77960-SWA-F230-M4 fail?

Stored crash data is the most common cause, and this applies even when no airbag was triggered in the accident. A standard diagnostic tool cannot reach this data to delete it. Aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes are also possible causes.

That an accident without airbag deployment still leaves data behind is not obvious. Airbag24 removes it during the repair.

The other causes are rather gradual. Components age, solder joints can stay cold, and moisture attacks the contacts. Voltage spikes occur, for example, when starting with an external power source.

How can you tell that the 77960-SWA-F230-M4 is defective?

The airbag warning light in the instrument cluster stays on permanently or intermittently, and an error message appears on the display. If the diagnostic tool cannot establish a connection to the 77960-SWA-F230-M4 and the fault memory cannot be cleared, this also points to a fault.

Airbags and seatbelt pretensioners may then not deploy in an emergency. The behaviour of the warning light is therefore a clear warning signal, which must be taken seriously and checked.

Which vehicles is the 77960-SWA-F230-M4 fitted in?

The airbag control unit 77960-SWA-F230-M4 is fitted in vehicles from Honda. It is fitted in these vehicles: Honda CR-V 3 RE (2006-2012).

The vehicles are listed here:

• Honda CR-V 3 RE (2006-2012)

First compare the part number on the label of the removed unit with this page. That only establishes that it is the right unit, not why it failed. Also have the fault memory read out beforehand, because the log shows whether the control unit itself or a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 77960-SWA-G214-M4, 77960-SWA-S21, 77960-SWA-S214-M4, 77960-T0AA-110-M1, 77960-TA0-A031, 77960-TLA-A25.

How does the repair of the 77960-SWA-F230-M4 work?

Processing at Airbag24 usually takes 3–4 working days. During this time, the control unit 77960-SWA-F230-M4 is checked, repaired and tested.

At the beginning, the fault memory is read out and the log is attached to the unit. Then disconnect the battery. Only afterwards do you remove the control unit, create the repair order online and send it in, well packed.

Airbag24 checks the unit on the test bench, replaces defective components, deletes stored crash data and carries out a function test. Afterwards, your own, repaired unit goes back to you.

Our repairs come with 2 years' statutory liability for defects. The repaired control unit comes back with all vehicle data and is ready for use as soon as it is refitted — no coding or programming is required.

How does the control unit 77960-SWA-F230-M4 get to Airbag24?

You send the control unit 77960-SWA-F230-M4 to Airbag24 as a parcel, or book a UPS collection for an extra charge. After the repair, Airbag24 returns it by UPS.

Place the printed repair order in the parcel and pack the unit so that it is shock-resistant.